Physics Elasticity Question 52
Question: If the force constant of a wire is K, the work done in increasing the length of the wire by l is
[MP PMT 1989]
Options:
A) Kl/2
B) Kl
C) $ Kl^{2}/2 $
D) $ Kl^{2} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ K=\frac{F}{l} $ and$ W=\frac{1}{2}Fl=\frac{1}{2}Kl\times l=\frac{1}{2}Kl^{2} $
BETA
